[citation needed]
The problem with your statement isn't the claim that tribal behaviours are a natural tendency in humans. Of course they are. The problem is your claim that they are somehow primary. There are many other tendencies of comparable weight, and how strongly they are expressed relative to each other depends very much on the individual.
Not to mention that when it comes to tribal instincts, there's a huge difference between individuals as to what they perceive their tribe to be. Their nuclear family? Their town/state/country? Their profession? Participants in their hobby? Their "race"? All of humanity?
Pretty much the whole of human history? There's no shortage of examples. To the contrary, it's more difficult to find examples that do not demonstrate tribalism.
> difference between individuals as to what they perceive their tribe to be
This is a recent luxury that hasn't existed for more than a century. Other than a few cultures here and there that encouraged blended demographics (usually as a consequence of conquest, think Rome).
It's not perfect there but most of the world is currently functioning.
The recent push to censor and silence dissent isn't an anomaly: the several hundreds years post enlightenment that gave us the ideas of individual rights and freedoms were the anomaly.
I also do not believe anyone advocating the censoring of others has been themselves censored, or put in a minority position where they were afraid to express dissent. Because if you have that experience, it tends to give one a dim view of censorship.